SiteAuditLint comparisons
SiteAuditLint runs the crawl on your Windows PC, with no monthly crawl credit allowance.
Screaming Frog and SiteAuditLint are desktop crawlers: the crawl runs on your own computer and the data stays there. Ahrefs Site Audit runs in the cloud as one tool inside a research suite best known for its backlink index and keyword database, and every page it crawls draws down a monthly allowance of crawl credits.
That makes this less a feature contest and more a question of what you are buying. If you need backlink research, Ahrefs is the product and Site Audit comes with it. If you need technical audits, the question is whether a credit-metered cloud crawler, an annual desktop licence, or a one-time desktop licence fits how often and how deeply you crawl.
Screaming Frog vs Ahrefs vs SiteAuditLint: at a glance
The table compares where each crawl runs, how crawl volume is limited, free access, billing, and the research data around each audit.
| Feature | Screaming Frog | Ahrefs | SiteAuditLint |
|---|---|---|---|
| Product type | Desktop SEO crawler | Cloud SEO suite with Site Audit | Desktop SEO crawler |
| Where the crawl runs | Your computer | Ahrefs servers | Your Windows PC |
| Platform | Windows, macOS, Linux | Web browser | Windows |
| How crawl volume is limited | Hardware and memory on paid licence | Monthly crawl credits by plan | Unlimited URLs on Pro and Agency |
| Free option | 500 URLs per crawl | Ahrefs Webmaster Tools, verified own sites only | 100 URLs per audit, all checks |
| Entry paid price | $279/year (£199) | Lite $129/month | $99 one-time |
| Backlink index | No, connects to external data | Yes, core product | No, imports backlink CSV exports |
| Keyword research | No | Yes | No |
| JavaScript rendering | Yes, paid licence | Yes | Yes, optional Chromium rendering |
| Audit history | Crawl comparison of saved crawls | Project history in the cloud | Local history, Compare view, since-last-audit summary |
| AI search checks | Not built in | See Ahrefs' current AI tools | llms.txt, AI crawler access, AI Visibility (Pro) |
Ahrefs prices and credit allowances are list figures checked September 2026 and change by plan and region. Screaming Frog's unlimited crawling depends on available memory and storage.
Crawl credits vs crawling on your own machine
The biggest structural difference on this page is how crawl volume is paid for. Ahrefs Site Audit meters crawling with crawl credits: on the Lite plan, the monthly allowance is 100,000 credits, and each crawled page uses credits from that pool. Recrawling a 20,000-page site weekly would need around 80,000 credits a month before you audit anything else, which is why credit budgeting becomes part of the audit plan on a cloud crawler.
Desktop crawlers have no credit pool. Screaming Frog's paid licence and SiteAuditLint Pro both let you crawl as often as you like, and the practical ceiling is your machine's memory, disk, and the target server's tolerance for requests. SiteAuditLint stores every audit in a local SQLite database, so repeated crawls of the same site build a history without touching any allowance.
| Scenario | Screaming Frog (paid) | Ahrefs Lite | SiteAuditLint Pro |
|---|---|---|---|
| One 5,000-page site, crawled weekly | No limit | About 20,000 credits a month | No limit |
| One 30,000-page site, crawled weekly | No limit | About 120,000 credits a month, above the Lite allowance | No limit |
| Ten client sites of 8,000 pages, crawled monthly | No limit | About 80,000 credits a month | No limit |
Illustrative arithmetic assuming one credit per crawled page. Check Ahrefs' current credit rules, since rendering and plan changes can affect usage.
The trade-off runs the other way for teams. A cloud crawl is visible to everyone on the Ahrefs account and doesn't tie up a laptop. A desktop crawl is fast to start, private by default, and cheap to repeat, but it lives on one machine.
Ahrefs Webmaster Tools: the free route and its limits
Ahrefs Webmaster Tools (AWT) gives free access to Site Audit and backlink data for websites you verify you own. For a site owner auditing a single property, that is a genuine free alternative to paying for a crawler.
The limit is verification. AWT does not audit sites you cannot verify, so it doesn't cover competitor sites, prospects, or client sites where you lack Search Console or DNS access. Screaming Frog's free version crawls any site up to 500 URLs, and SiteAuditLint Free crawls any site up to 100 URLs with the full check catalogue, so both work for a quick look at a site you don't control.
| Free access question | Screaming Frog Free | Ahrefs Webmaster Tools | SiteAuditLint Free |
|---|---|---|---|
| Can audit sites you don't own | Yes | No, verification required | Yes |
| Crawl size | 500 URLs | Set by AWT terms | 100 URLs per audit |
| Backlink data included | No | Yes, for verified sites | Import only, on Pro |
| Checks included on the free option | Core crawl, paid features locked | Site Audit for verified sites | All 76 checks, CSV export |
Total cost of ownership for technical audits
Ahrefs costs more because it sells far more than a crawler: backlink research, keyword data, rank tracking, and content tools. The comparison below is only fair if technical audits are what you need. If backlink research is the job, Ahrefs' price buys the research and Site Audit is a bonus.
Screaming Frog
Free: 500 URLs per crawl
Annual per-user licence, renewed each year to keep paid features.
Ahrefs
Lite, or $1,290/year billed annually
Subscription with monthly usage credits. Starter from $29/month with tighter limits.
SiteAuditLint
Free: 100 URLs per audit
One-time Pro licence with unlimited URLs. Agency is $159 once.
| Period | Screaming Frog | Ahrefs Lite (annual billing) | SiteAuditLint Pro |
|---|---|---|---|
| Year 1 | $279 | $1,290 | $99 |
| Year 3 total | $837 | $3,870 | $99 |
| Year 5 total | $1,395 | $6,450 | $99 |
One user, list prices held constant, no add-ons or extra seats. Ahrefs pricing includes research tools that neither crawler offers.
Backlinks and broken pages: using Ahrefs data in a desktop audit
A common reason to keep Ahrefs alongside a desktop crawler is backlink data. A crawler finds which pages return 404 or redirect; Ahrefs knows which of those pages other websites still link to. Put the two together and you get a list of broken pages that are wasting real link equity.
SiteAuditLint Pro does this join on your machine. Export your backlinks from Ahrefs (Search Console, Semrush, Moz, and Majestic exports also work), import the CSV, and the audit adds three backlink checks:
- Broken page with backlinks: a URL returning an error still has links from other sites, so restoring it or redirecting it recovers that equity.
- Backlinked page not indexable: external links point at a page that is noindexed or canonicalised elsewhere.
- Backlinks point to a redirect: links land on a redirecting URL, which is a candidate for an outreach request to update the link.
The result can be exported as an outreach list for broken link building. Screaming Frog can also pull link metrics through its API connections to third-party tools, and Ahrefs shows broken backlinks inside its own interface for sites you track.
Priority fixes, with affected URL counts
Action Plan ranked by impact and effort
Technical SEO checks compared
All three cover the core of a technical audit. The differences are in configuration depth, where results live, and what surrounds the crawl.
| Check or capability | Screaming Frog | Ahrefs Site Audit | SiteAuditLint 0.8.0 |
|---|---|---|---|
| Status codes, broken links, redirect chains and loops | Yes | Yes | Yes |
| Canonical, noindex and robots.txt checks | Yes | Yes | Yes |
| Exact and near-duplicate content | Yes | Yes | Yes |
| Orphan pages and click depth | Yes | Yes | Yes, sitemap-only orphans and pages deeper than 4 clicks |
| Structured data validity | Yes | Yes | Missing or invalid JSON-LD |
| Scheduled crawls | Yes, paid licence | Yes | Yes, headless runs via Windows Task Scheduler |
| Reports | Exports and reports | In-app and exports | HTML, PDF and CSV on Pro; CSV on Free |
Tracking fixes between crawls
Ahrefs keeps project history in the cloud, and Screaming Frog compares saved crawl files. SiteAuditLint keeps every audit locally and compares any two runs of the same site, so the Compare view shows which issue types went down, which went up, and by how much.
Audit history stored on your PC
Compare view: previous vs current counts
Which one fits your workflow?
Screaming Frog
Choose it if you want the deepest crawl configuration, custom extraction, and a crawler that runs on Windows, macOS, or Linux, and an annual licence suits you.
Ahrefs
Choose it if backlink research and keyword data are your daily work, your team wants shared cloud projects, and Site Audit within your crawl credits covers your technical needs.
SiteAuditLint
Consider it if you want unlimited desktop crawls on Windows for a one-time $99, and want to combine your Ahrefs backlink export with crawl errors to find pages worth fixing.
Many teams keep Ahrefs for research and run a desktop crawler for technical audits, which also keeps crawl credits free for the sites that need cloud monitoring.
Frequently asked questions
Can Ahrefs replace Screaming Frog for technical SEO audits?
Ahrefs Site Audit covers most standard technical checks and runs in the cloud, but crawl volume is limited by monthly crawl credits. Screaming Frog offers deeper crawl configuration and custom extraction with no credit pool. Many SEO teams use Ahrefs for backlink and keyword research and a desktop crawler for detailed audits.
What are Ahrefs crawl credits?
Ahrefs Site Audit meters crawling with a monthly allowance of crawl credits. The Lite plan includes 100,000 credits a month, and crawled pages draw from that allowance, so large sites or frequent recrawls can use it up. Desktop crawlers such as Screaming Frog and SiteAuditLint Pro have no credit allowance.
Is Ahrefs Webmaster Tools free?
Yes. Ahrefs Webmaster Tools gives free access to Site Audit and backlink data for websites you verify you own. It cannot audit sites you don't control, such as competitor or prospect sites.
Can SiteAuditLint use Ahrefs backlink data?
Yes. SiteAuditLint Pro imports backlink CSV exports from Ahrefs, Google Search Console, Semrush, Moz, and Majestic, then flags broken pages that still have backlinks, backlinked pages that are not indexable, and backlinks that point to redirects.
Is SiteAuditLint an Ahrefs alternative?
For technical site audits, yes. For backlink research and keyword data, no: SiteAuditLint does not maintain its own backlink index or keyword database. It works alongside Ahrefs by combining your Ahrefs export with its crawl results.
How much do these tools cost over three years?
At list prices for one user, Screaming Frog costs about $837 over three years, Ahrefs Lite billed annually about $3,870, and SiteAuditLint Pro $99 once. Ahrefs includes research tools that the two crawlers do not.